I want to charge customers for something. I recognize that FormsCentral would support collecting any type of forms-based information, including credit card and PayPal data, for processing elsewhere. But does FormsCentral offer any ability to validate and charge the customor credit card or PayPal information? If not, does FormsCentral intergrate with any third-party charging services, merchant accounts, etc.?

The only way to collect payments would be to use our PayPal integration. This means you don't collect their PayPal email explicitly but actually let the form redirect to PayPal for paymemts before submitting the data. The response table in FormsCentral then keep track of the transaction ID.

For more information on collecting payments via PayPal see this tutorial